HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$605+ Cheap flights from Portland, ME (PWM) to Portugal

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/1. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Jul 16 — Jul 231
Thu 7/16
Thu 7/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Portugal with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Portland to Portugal

Cheapest flights from Portland to Portugal
Explore the most affordable flight options available from Portland to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 16, 2026.

This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/75:06 pm
PWM
-
OPO
1 stop11h 24m
United Airlines
Thu 12/106:00 am
OPO
-
PWM
2 stops21h 57m
United Airlines
Deal found 6/11$717
This United Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/159:10 am
PWM
-
OPO
1 stop19h 20m
United Airlines
Thu 12/246:00 am
OPO
-
PWM
2 stops20h 27m
United Airlines
Deal found 6/15$773
This United Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/243:15 pm
PWM
-
OPO
1 stop13h 15m
United Airlines
Tue 12/16:00 am
OPO
-
PWM
2 stops21h 57m
United Airlines
Deal found 6/15$774
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2410:00 am
PWM
-
OPO
2 stops19h 35m
Delta
Tue 12/15:00 am
OPO
-
PWM
2 stops22h 23m
Delta
Deal found 6/15$779
This Delta deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2511:30 am
PWM
-
LIS
2 stops19h 50m
Delta
Fri 10/305:30 am
LIS
-
PWM
2 stops22h 19m
Delta
Deal found 6/13$794
This American Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:00 am
PWM
-
LIS
1 stop23h 05m
American Airlines
Fri 10/3011:05 am
LIS
-
PWM
1 stop11h 20m
American Airlines
Deal found 6/13$799
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:06 pm
PWM
-
OPO
1 stop12h 24m
United Airlines
Sat 11/76:00 am
OPO
-
PWM
2 stops22h 59m
United Airlines
Deal found 6/11$817
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2910:56 am
PWM
-
OPO
1 stop17h 49m
United Airlines
Wed 8/56:00 am
OPO
-
PWM
2 stops22h 51m
United Airlines
Deal found 6/14$928
This United Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/17:35 pm
PWM
-
LIS
1 stop9h 55m
United Airlines
Sun 9/610:25 am
LIS
-
PWM
2 stops28h 39m
United Airlines
Deal found 6/15$1,010
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/265:15 am
PWM
-
LIS
1 stop24h 15m
United Airlines
Sun 8/25:05 am
LIS
-
PWM
2 stops23h 46m
United Airlines
Deal found 6/11$1,012
This Cheapflightsfares deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:40 pm
PWM
-
LIS
1 stop14h 35m
TAP AIR PORTUGAL
Sat 9/195:00 pm
LIS
-
PWM
1 stop11h 52m
TAP AIR PORTUGAL
Deal found 6/15$1,052
This Orbitz deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:00 am
PWM
-
PDL
2 stops47h 45m
Multiple Airlines
Mon 9/147:40 pm
PDL
-
PWM
2 stops32h 12m
Multiple Airlines
Deal found 6/15$1,062

Find flight deals from Portland to Portugal

Keep the following information in mind while searching for Portland to Portugal flight deals. Data was last updated June 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$717
(United Airlines)

One-way from

$605
(Kiwi.com)

Popular in

December

Cheapest in

February
Provider with most accurate pricing for Portland-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Lisbon Humberto Delgado flights.
Search Deals
From Portland to Portugal
Search Deals
One-way flight from Portland to Portugal
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($134 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease ($121 potential savings vs. average RT price).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 16, 2026.
Use the filters below to find and compare flights from Portland to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandPorto

PWM - OPO

PWMOPO

Portland

Mon 12/7

5:06 pm-9:30 am

1 stop11h 24m

Porto

Thu 12/10

6:00 am-10:57 pm

2 stops21h 57m

$717

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 11/24

10:00 am-10:35 am

2 stops19h 35m

Porto

Tue 12/1

5:00 am-10:23 pm

2 stops22h 23m

$779

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 10/25

11:30 am-11:20 am

2 stops19h 50m

Lisbon Humberto Delgado

Fri 10/30

5:30 am-11:49 pm

2 stops22h 19m

$794

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 10/30

9:45 am-9:30 am

2 stops19h 45m

Porto

Sat 11/7

6:00 am-9:27 pm

2 stops20h 27m

$822

PortlandPorto

PWM - OPO

PWMOPO

Portland

Wed 7/29

10:56 am-9:45 am

1 stop17h 49m

Porto

Wed 8/5

6:00 am-11:51 pm

2 stops22h 51m

$928

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 9/1

7:35 pm-10:30 am

1 stop9h 55m

Lisbon Humberto Delgado

Sun 9/6

10:25 am-10:04 am

2 stops28h 39m

$1,010

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 8/27

7:35 pm-10:30 am

1 stop9h 55m

Lisbon Humberto Delgado

Sat 9/19

5:05 am-11:32 pm

2 stops23h 27m

$1,064

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 7/26

2:20 pm-11:45 am

2 stops16h 25m

Lisbon Humberto Delgado

Sun 8/2

6:45 am-11:51 pm

2 stops22h 06m

$1,068

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 8/27

2:53 pm-2:55 pm

2 stops19h 02m

Lisbon Humberto Delgado

Sat 9/19

5:00 am-11:59 pm

2 stops23h 59m

$1,069

PortlandPonta Delgada

PWM - PDL

PWMPDL

Portland

Tue 9/8

1:17 pm-11:45 pm

2 stops30h 28m

Ponta Delgada Nordela

Wed 9/16

7:30 pm-11:52 pm

2 stops32h 22m

$1,210

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 26 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Portland to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Portugal
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated June 16, 2026.
See what other customers who have flown with United Airlines from Portland to Portugal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,842 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,842 reviews
United Airlines
7.4
Good
9,842 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Related info for your journey

Find useful and relevant information for your journey from Portland to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Portland to Portugal?

    For a flight from Portland to Portugal, you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city.

  • How long is the flight from Portland, Maine to Portugal?

    For as low as $717, United Airlines can have you in Portugal from Portland, Maine in 11h 24m. The distance between Portland, Maine and Portugal is about 3071 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Portland, Maine to Portugal?

    The most popular flight routes from Portland, Maine to Portugal are Portland - Ponta Delgada Nordela, Portland - Lisbon Humberto Delgado and Portland - Porto.

  • Can I find deals for flights from Portland to Portugal that include hotel bookings?

    Yes. In addition to deals on Portland to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Portugal.

  • Can I find deals for business class flights from Portland to Portugal?

    Yes. Cheapflights offers flight deals from Portland to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Portland to Portugal

Discover the top airline that operate flights from Portland to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$679FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.